Freezing VIM

This is happen when I press Ctrl + S in your VIM. Cause VIM do not response any input. Means, VIM do not print (but still save) anything you typed. Even when you try to kill them (sending kill signal to VIM).

You can get back your VIM into “normal” condition by pressing Ctrl + Q. And viola.. VIM now print everything you typed before.

The reason is, as Michael Mrozek explained, pressing Ctrl + S will trigger xoff that will disable screen painting. This screen painting will be reenabled by  pressing Ctrl + Q (trigger xon).

Congratulation.
Thank’s to Stackoverflow and all.